105 lines
3.5 KiB
C
105 lines
3.5 KiB
C
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#ifndef FTCIMAGE_H
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#define FTCIMAGE_H
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#include <cache/ftcmanag.h>
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#include <freetype/ftglyph.h>
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typedef struct FTC_Image_QueueRec_* FTC_Image_Queue;
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typedef struct FTC_Image_CacheRec_* FTC_Image_Cache;
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typedef struct FTC_ImageNodeRec_* FTC_ImageNode;
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/* types of glyph images */
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typedef enum FTC_Image_Type_
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{
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ftc_image_mono = 0, /* monochrome bitmap */
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ftc_image_grays, /* anti-aliased bitmap */
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ftc_image_outline, /* scaled outline */
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ftc_image_master_outline, /* original outline */
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} FTC_Image_Type;
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/* a descriptor used to describe all glyphs in a given queue */
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typedef struct FTC_Image_Desc_
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{
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FTC_FaceID face_id;
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FT_UInt pix_width;
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FT_UInt pix_height;
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FT_UInt image_type;
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} FTC_Image_Desc;
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/* macros used to pack a glyph index and a queue index in a single ptr */
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#define FTC_PTR_TO_GINDEX(p) ((FT_UInt)((FT_ULong)(p) >> 16))
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#define FTC_PTR_TO_QINDEX(p) ((FT_UInt)((FT_ULong)(p) & 0xFFFF))
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#define FTC_INDICES_TO_PTR(g,q) ((FT_Pointer)(((FT_ULong)(g) << 16) | \
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((FT_ULong)(q) & 0xFFFF)))
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typedef struct FTC_ImageNodeRec_
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{
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FT_ListNodeRec root1; /* root1.data contains a FT_Glyph handle */
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FT_ListNodeRec root2; /* root2.data contains a glyph index + queue index */
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} FTC_ImageNodeRec;
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/* macros to read/set the glyph & queue index in a FTC_ImageNode */
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#define FTC_IMAGENODE_GET_GINDEX(n) FTC_PTR_TO_GINDEX((n)->root2.data)
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#define FTC_IMAGENODE_GET_QINDEX(n) FTC_PTR_TO_QINDEX((n)->root2.data)
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#define FTC_IMAGENODE_SET_INDICES(g,q) \
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do { (n)->root2.data = FTC_INDICES_TO_PTR(g,q); } while (0)
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typedef struct FTC_Image_CacheRec_
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{
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FTC_Manager manager;
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FT_Memory memory;
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FT_ULong max_bytes; /* maximum size of cache in bytes */
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FT_ULong num_bytes; /* current size of cache in bytes */
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FT_Lru queues_lru; /* static queues lru list */
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} FTC_Image_Cache;
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/* a table of functions used to generate/manager glyph images */
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typedef struct FTC_Image_Class_
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{
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FT_Error (*init_image)( FTC_Image_Queue queue,
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FTC_Image_Node node );
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void (*done_image)( FTC_Image_Queue queue,
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FTC_Image_Node node );
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FT_ULong (*size_image)( FTC_Image_Queue queue,
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FTC_Image_Node node );
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} FTC_Image_Class;
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typedef struct FTC_Image_QueueRec_
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{
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FTC_Image_Cache cache;
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FTC_Manager manager;
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FT_Memory memory;
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FTC_Image_Class* clazz;
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FTC_Image_Desc descriptor;
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FT_UInt hash_size;
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FT_List buckets;
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} FTC_Image_SubCacheRec;
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FT_EXPORT_DEF(FT_Error) FTC_Image_Cache_New( FTC_Manager manager,
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FT_ULong max_bytes,
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FTC_Image_Cache *acache );
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FT_EXPORT_DEF(void) FTC_Image_Cache_Done( FTC_Image_Cache cache );
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FT_EXPORT_DEF(FT_Error) FTC_Image_Cache_Lookup( FTC_Image_Cache cache,
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FTC_Image_Desc* desc,
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FT_UInt gindex,
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FT_Glyph *aglyph );
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#endif /* FTCIMAGE_H */
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